Car-brake.



7 No." 796,93I. PATENTEID AUG. .8, 1905 w. QUINN,

GAR. BRAKE.

APPLIGATION FILED JAN. 19. 1905.

2 SHEETS-SHEET 1'.

71 Qua Eng/($17 No. 796,931- PATENTED AUG. 8, 1905.

W. QUINN.

GAR BRAKE.

APPLICATION FILED JAN. 19, 1905.

2 BEEETS -BHEET 2.

, I .Ikbldflf Q4021 mmnzwv a. GRAHAM 0a.. FHDYGLINDGRAPHERS. wnsmucrovkn. c.

UNITED STATES PATENT OFFICE.

CAR-BRAKE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed January 19, 1905. Serial No. 241,7 81.

To (LZZ whom, [It may concern:

Be it known that I, WILLIAM QUINN, a citizen of the United States,residing at Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented a certain new and useful Improvement inCar-Brakes, of which the following is a specification.

My invention relates to a new and useful improvement in brakes for cars,and has for its object to provide both a wheel-brake and track-brakeadapted to be operated independent of one another from the same cranklocated upon the platforms.

With these ends in view this invention consists in the details ofconstruction and corn bination of elements hereinafter set forth andthen specifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, the constructionand operation will now be described in detail,

referring to theaccompanying drawings,-

forminga part of this specification, in Which Figure 1 represents a sideelevation of a portion of a car equipped with my improved brake; Fig. 2,a bottom plan view of a car without the trucks or wheels, showing mybrake applied thereto, portions of the car being broken away; Fig. 3, aside elevation of the track-brake with the outside plates removed,showing the same in the position it would assume when the wheel-brakesare set; Fig. 4, a similar view to Fig. 3, but showing the parts in theposition they would assume when the track-brake was set and thewheelbrakes released; Fig. 5, a vertical section through Fig. 4.

The purpose of my invention is to equip a car with both wheel-brakes andtrack-brakes, both to be operated from the same source of power-as, forinstance, a crank located upon the platform-so that in ordinaryinstances by turning the crank a certain distance around, the same as isdone at the present time, the wheel-brakes will be set and by releasingthe crank and turning it in the opposite direction the wheel-brakes willbe released; but after the wheel-brakes are set and it is found thatthey do not arrest the motion of the car sufficiently to avoid anaccident or to stop at a desired point then by turning the crank afarther distance or double the distance it requires to set thewheel-brakes the track-brake will be set and the wheel-brakes released.To accomplish this, I provide the followingconstruction, in which Arepresents a casing adapted to be secured to the under side of the carupon each side thereof, and this casing has formed therein a guidewayfor guiding the shank B of the friction-shoe B.

G is a shaft extending across the car and journaled in suitable bearingsdepending therefrom. This shaft C extends laterally through both casingsA and through an oblong openingB formed th rough each shank B.

D represents cams secured to the shaft 0 and located within the oblongopenings B of the shanks B, and these cams D and openings B are soshaped that it will require a half-revolution of the shaft C to eitherraise the friction-shoe B to its highest position, as shown in Fig. 1,or force it downward in its lowest position in contact with the track,as shown in Fig. 4.

E is a gear-Wheel secured to the shaft C.

F is a bar extending the full length of the car and adapted toreciprocate in suitable guideways secured to the car. This bar F isprovided upon its under side with rack-teeth F for a suitable distanceengaging the teeth of the gear E, and upon each end of the bar F areprovided rack-teeth F engaging spur- Wheels Gr, located upon the lowerend of the crank-shaft H, which crank-shafts are located upon theplatforms of the car and are the same as are now ordinarily used inapplying the hand-brakes. Thus it Will be seen that when eithercrank-shaft H is turned the bar F will be reciprocated and the wheel Eand shaft O revolved.

1 represents two oval-shaped cams secured to the shaft C and adapted tooperate within the housings J, and each of said housings is connected bythe links K with the wheelbrakes, so that when said links K are pulledupon the brakes will be set. These oval-shaped cams I are of such ashape relative to the housings J that a quarter-revolution of the shaftC will set the wheel-brakes, but a half-revolution will release thesame. So it will be seen that in order to set the wheel-brakes it isonly necessary for the motorman to revolve the crank-shaft a suflicientdistance to give the shaft C one quarter-revolution, thus setting theWheel-brakes; but should it be desired to set the track-brakes then byrevolving the crank-shaft a farther distance, so as to give the shaft Ca half-revolution, the trackbrake will be set and the wheel-brakesreleased, and in relieving the track-brake the wheel-brake will be setagain while the crank shaft is being revolved backward to its normalposition.

It will be seen in this device that all the operations are positive, andI do not depend upon any spring for the lowering or raising of the shoeor for setting or releasing the wheelbrakes.

It is obvious that a large number of means could be employed forrevolving the shaft from the platform-such as chain connection, gearing,or any other suitable manneror, instead of one continuous rack-bar, tworackbars could be ,used extending to the different platforms, and I donot wish to be limited to the exact construction here shown, as slightmodifications could be made without departing from the spirit of myinvention.

Having thus fully described my invention, what I claim as new and usefulis 1. In a car-brake of the character described, a casing secured in themiddle of the car upon each side and depending therefrom, frictionshoes,shanks extending upward from said friction-shoes and adapted to slidevertically in the casing, a shaft extending across the car, canissecured to said shaft and located in alinement with the shanks of thefriction-shoes adapted to raise and lower the friction-shoes as theshaft is revolved, cams located upon the shaft, housings inclosing saidcams and against which the cams operate, links connecting said housingswith the wheel-brake apparatus of the car, and means for rotating theshaft from either platform, as and for the purpose specified.

2. In acar-brake of the character described,

' a casing depending from the car upon each side, a shaft extendingtransversely across the car and journaled thereto, friction-shoesprovided with shanks extending upward therefrom, guideways formed in thecasing for guiding said shanks in their vertical movement, lateralopenings formed through the shanks through which the shaft extends, camssecured to the shaft and located within the l lateral openings of theshanks so that the friction-shoes will be raised and lowered as theshaft is revolved, a second set of cams secured to the shaft, housingsinclosing said cams and against which the cams operate, links connectingthe housings with the wheel brake apparatus so that the wheel-brake willbe set when the shaft is revolved, and means for revolving said shaftfrom the platform of the car, as and for the purpose specified.

3. In acar-brake of the character described, a casing depending from themiddle of the car upon each side, a shaft extending transversely acrossthe car through the casings, frictionshoes provided with shanksextending upward therefrom, the casings provided with guideways forguiding said shanks in their vertical movement, transverse openingsformed through the shanks through which the shaft extends, cams securedto the shaft and located within said transverse openings, said cams andopenings so shaped as to cause the friction-shoes to be raised orlowered when the shaft is revolved through a certain partial revolution,cams located upon the shaft, housings surrounding said cam and againstwhich the same operate, links connecting said hous ings with thewheel-brake apparatus, said housings and cams so shaped relative to oneanother that the wheel-brake apparatus will be set when the shaft hasbeen turned only half the necessary distance to set the trackbrakes, andwhen the track-brakes are set the wheel-brake cams will be so turned asto release the wheel-brakes, and means for revolving the shaft fromeither platform of the car, as specified.

In testimony whereofI have hereunto aflixed my signature in the presenceof two subscribing witnesses.

WVILLIAM QUINN.

WVitnesses:

JOSEPH C. MURPHEY, M. E. SMEDLEY.

